High 7.5Published Mar 10, 2023

CVE-2023-27530A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to caus…

Updated under an hour ago (Oct 27, 2026, 10:50 PM ET)

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Exploited in the last 30 days

A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to cause multipart parsing to take longer than expected.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

rack rack rack:rack	before 2.0.9.3; from 2.1.0 before 2.1.4.3; from 2.2.0 before 2.2.6.3; from 3.0.0 before 3.0.4.2	NVD
debian debian_linux debian:debian_linux	10.0; 11.0	NVD

References

References

https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388	patch, vendor-advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html	mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20231208-0015/
https://www.debian.org/security/2023/dsa-5530	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.